docs(bigquery): update existing code samples

[emar-kar]

List of changes:

1. browse_table_data:
   • add a description of how to print row data in tabular format. (as it was before).
2. All files
   • add API request, Must match the destination dataset location and Waits for the job to complete comments.
3. get_routine:
   • change whitespaces in prints to \t;
   • since routine.arguments doesn't have type_ attribute, it was changed to data_type.

    for argument in routine.arguments:
        print("\t\tName: '{}'".format(argument.name))
        print("\t\tType: '{}'".format(argument.type_))
        AttributeError: 'RoutineArgument' object has no attribute 'type_'

4. test_browse_table_data:
   • add additional assertions (see point 1).
5. test_load_table_dataframe:
   • according to pytest docs .importorskip should be assigned to its canonical name (@tswast can you confirm these imports are required).
6. test_get_dataset and test_list_datasets_by_label:
   • exclude string formatting from the assert.
7. test_routine_samples:
   • divide into separate test files:
     • test_create_routine;
     • test_create_routine_ddl;
     • test_delete_routine;
     • test_get_routine (new file);
     • test_list_routines;
     • test_update_routine;

[plamut]

Just wondering - what's with all the dots at the end of one-line comments, e.g. # API request.?
It seems a bit unusual (to me at lest), but nothing significant.

Anyhow, the changes look good to me all in all.

[emar-kar]

@plamut Yeah, I was surprised too. I saw these dots in several files that were already there. I need to know for sure, how @tswast would like to see BigQuery samples, to unify the design of all files. I appreciate your review.

[tswast]

The dots are probably because our internal samples style requires that all comments be complete sentences, with capital letters and punctuation. Accordingly, these comments should be changed to "Make an API request." or "The following function makes an API request."

[plamut]

@emar-kar I presume you just rebased, correct, no other changes?

If this was to fix the commit message lint check, I changed the PR title to make the bot happy. We can merge the PR once the tests pass again.

[emar-kar]

@plamut yeah, I changed the comment lines and got this confusing error. New day = new features. Just read all about it. Thank you!

[plamut]

The Recommender failure is probably flakiness, I saw it on one of the other PRs, too (a re-run helped).

Edit: Well, or a "permanent" issue until it gets fixed, it again failed on several PRs even after retries.